Chen Chaowen, Zhang Jia, Zhang Guilong, Wang Dongfang, Wang Jun, Cai Dongqing, Wu Zhengyan
Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
Fundam Res. 2023 Mar 25;4(4):868-881. doi: 10.1016/j.fmre.2023.03.001. eCollection 2024 Jul.
In this work, two kinds of primary batteries, both of which included a Zn anode, C rod cathode, copper wire and electrolyte composed of Cd-contaminated water or soil, were constructed in the first attempt to both remove Cd and generate electricity. Unlike traditional technologies such as electrokinetic remediation with high energy consumption, this technology could realize Cd migration to aggregation and solidification and generate energy at the same time through simultaneous galvanic reactions. The passive surface of Zn and C was proven via electrochemical measurements to be porous to maintain the relatively active galvanic reactions for continuous Cd precipitation. Cd RE (removal efficiency) and electricity generation were investigated under different conditions, based on which two empirical models were established to predict them successfully. In soil, KCl was added to desorb Cd from soil colloids to promote Cd removal. These systems were also proven to remove Cd efficiently when their effects on plants, zebrafish, and the soil bacterial community were tested. LEDs could be lit for days by utilizing the electricity produced herein. This work provides a novel, green, and low-cost route to remediate Cd contamination and generate electricity simultaneously, which is of extensive practical significance in the environmental and energy fields.
在这项工作中，首次构建了两种原电池，它们都包含锌阳极、碳棒阴极、铜线以及由受镉污染的水或土壤组成的电解质，旨在同时去除镉并发电。与电动修复等传统高能耗技术不同，该技术能够通过同时发生的电化学反应实现镉的迁移、聚集和固化，同时产生能量。通过电化学测量证明，锌和碳的钝化表面具有多孔性，以维持相对活跃的电化学反应，实现镉的持续沉淀。研究了不同条件下的镉去除效率（RE）和发电情况，并在此基础上建立了两个经验模型，成功地对它们进行了预测。在土壤中，添加氯化钾以从土壤胶体中解吸镉，促进镉的去除。当测试这些系统对植物、斑马鱼和土壤细菌群落的影响时，也证明它们能有效去除镉。利用此处产生的电能，发光二极管可以点亮数天。这项工作为同时修复镉污染和发电提供了一条新颖、绿色且低成本的途径，在环境和能源领域具有广泛的实际意义。
